It's not a big enterprisey mish-mash if that's what you're thinking :) Everything has its place. Flash is used for the animated ipanels just because it is easier for the designers to use. (It also is used for IB video chat because of its easy hookup to the webcams installed on the box.) Silverlight is used for all the TV streaming because the live video streaming is built on top of WM smooth streaming tech. .NET is used as a hosting environment for bits and pieces such as the Bing maps integration. It is also how apps such as our dev IDE are run. I can log into any terminal anywhere in the world and run any of our internal stand-alone apps without admin rights. (And via any browser using BBA to login.)